<template>
  <div>
    <div class="shopcart">
      <div class="content" @click="toggleList">
        <div class="content-left">
          <div class="logo-wrapper">
            <div class="logo" :class="{'highlight':totalCount>0}">
              <i class="icon-shopping_cart" :class="{'highlight':totalCount>0}"></i>
            </div>
            <div class="num" v-show="totalCount>0">{{totalCount}}</div>
          </div>
          <!-- <div class="price" :class="{'highlight':totalPrice>0}">￥{{totalPrice}}</div> -->
          <!-- <div class="desc">另需配送费￥{{deliveryPrice}}元</div> -->
        </div>
        <div class="content-right" @click.stop.prevent="pay">
          <div class="pay" :class="payClass">
            {{payDesc}}  ￥{{this.totalPrice}}
          </div>
        </div>
      </div>
      <div class="ball-container">
        <div v-for="ball in balls" :key="ball.id">
          <transition name="drop" @before-enter="beforeDrop" @enter="dropping" @after-enter="afterDrop">
            <div class="ball" v-show="ball.show">
              <div class="inner inner-hook"></div>
            </div>
          </transition>
        </div>
      </div>
      <transition name="fold">
        <div class="shopcart-list" v-show="listShow">
          <div class="list-header">
            <h1 class="title">已选用商品</h1>
            <span class="empty" @click="empty">清空</span>
          </div>
          <div class="list-content" ref="listContent">
            <ul>
              <li class="food" v-for="food in selectFoods" :key="food.id">
                <span class="name">{{food.name}}</span>
                <div class="price">
                  <span>￥{{food.price*food.count}}</span>
                </div>
                <div class="cartcontrol-wrapper">
                  <cartcontrol @add="addFood" :food="food"></cartcontrol>
                </div>
              </li>
            </ul>
          </div>
        </div>
      </transition>
    </div>
    <transition name="fade">
      <div class="list-mask" @click="hideList" v-show="listShow"></div>
    </transition>
  </div>
</template>

<script type="text/ecmascript-6">
import BScroll from 'better-scroll'
import cartcontrol from '@/components/Order/index/cartcontrol'

export default {
  props: {
    selectFoods: {
      type: Array,
      default () {
        return [
          {
            price: 10,
            count: 1
          }
        ]
      }
    },
    // deliveryPrice: {
    //   type: Number,
    //   default: 0
    // },
    minPrice: {
      type: Number,
      default: 0
    }
  },
  data () {
    return {
      balls: [
        {
          show: false
        },
        {
          show: false
        },
        {
          show: false
        },
        {
          show: false
        },
        {
          show: false
        }
      ],
      dropBalls: [],
      fold: true,
      userid: ''
    }
  },
  computed: {
    totalPrice () {
      let total = 0
      this.selectFoods.forEach(food => {
        total += food.price * food.count
      })
      return total
    },
    totalCount () {
      let count = 0
      this.selectFoods.forEach(food => {
        count += food.count
      })
      return count
    },
    payDesc () {
      if (this.totalPrice === 0) {
        return `已选用`
      } else {
        return '已选用'
      }
      // else if (this.totalPrice < this.minPrice) {
      //   let diff = this.minPrice - this.totalPrice
      //   return `还差￥${diff}元起送`
      // }
    },
    payClass () {
      if (this.totalPrice < this.minPrice) {
        return 'not-enough'
      } else {
        return 'enough'
      }
    },
    listShow () {
      if (!this.totalCount) {
        /* eslint-disable */
        this.fold = true
        return false
      }
      let show = !this.fold
      if (show) {
        this.$nextTick(() => {
          if (!this.scroll) {
            this.scroll = new BScroll(this.$refs.listContent,
              {
                click: true
              })
          } else {
            this.scroll.refresh()
          }
        })
      }
      return show
    }
  },
  methods: {
    drop (el) {
      for (let i = 0; i < this.balls.length; i++) {
        let ball = this.balls[i]
        if (!ball.show) {
          ball.show = true
          ball.el = el
          this.dropBalls.push(ball)
          return
        }
      }
    },
    toggleList () {
      if (!this.totalCount) {
        return
      }
      this.fold = !this.fold
    },
    hideList () {
      this.fold = true
    },
    empty () {
      this.$dialog.confirm({
          mes: '确认清空？',
          opts: () => {
               this.selectFoods.forEach(food => {
                  food.count = 0
                })
          }
      });
    },
    pay () {
      if(this.selectFoods.length>0){
        this.$router.push({
         path: '/fill',
         query: { 
           selectFoods:JSON.stringify(this.selectFoods),
           totalPrice: this.totalPrice
         }
       })
      }else{
        this.$dialog.toast({mes: '请选择商品', timeout: 1000})
      }
    },
    addFood (target) {
      this.drop(target)
    },
    beforeDrop (el) {
      let count = this.balls.length
      while (count--) {
        let ball = this.balls[count]
        if (ball.show) {
          let rect = ball.el.getBoundingClientRect()
          let x = rect.left - 32
          let y = -(window.innerHeight - rect.top - 22)
          el.style.display = ''
          el.style.webkitTransform = `translate3d(0,${y}px,0)`
          el.style.transform = `translate3d(0,${y}px,0)`
          let inner = el.getElementsByClassName('inner-hook')[0]
          inner.style.webkitTransform = `translate3d(${x}px,0,0)`
          inner.style.transform = `translate3d(${x}px,0,0)`
        }
      }
    },
    dropping (el, done) {
      /* eslint-disable no-unused-vars */
      let rf = el.offsetHeight
      this.$nextTick(() => {
        el.style.webkitTransform = 'translate3d(0,0,0)'
        el.style.transform = 'translate3d(0,0,0)'
        let inner = el.getElementsByClassName('inner-hook')[0]
        inner.style.webkitTransform = 'translate3d(0,0,0)'
        inner.style.transform = 'translate3d(0,0,0)'
        el.addEventListener('transitionend', done)
      })
    },
    afterDrop (el) {
      let ball = this.dropBalls.shift()
      if (ball) {
        ball.show = false
        el.style.display = 'none'
      }
    }
  },
  components: {
    cartcontrol
  }
}
</script>

<style lang="stylus" rel="stylesheet/stylus" scoped>
@import '../../../common/stylus/mixin.styl'

.shopcart {
    position: fixed;
    left: 0;
    bottom: 0;
    z-index: 50;
    width: 100%;
    height: 48px;

    .content {
        display: flex;
        background: #fff;
        font-size: 0;
        color: rgba(0, 0, 0, 0.4);
        border-bottom 1px solid  #92d4ef
        border-top 1px solid  #92d4ef
        box-sizing border-box
        .content-left {
            flex: 1;

            .logo-wrapper {
                display: inline-block;
                vertical-align: top;
                position: relative;
                top: -15px;
                margin: 0 12px;
                padding: 1px;
                width: 60px;
                height: 60px;
                box-sizing: border-box;
                border-radius: 50%;
                background: #92d4ef;

                .logo {
                    width: 100%;
                    height: 100%;
                    border-radius: 50%;
                    text-align: center;
                    background: #fff;

                    &.highlight {
                        background: rgb(255, 255, 255);
                    }

                    .icon-shopping_cart {
                        line-height: 60px;
                        font-size: 34px;
                        color: #92d4ef;

                        &.highlight {
                            color: #92d4ef;
                        }
                    }
                }

                .num {
                    position: absolute;
                    top: 0;
                    right: 0;
                    width: 24px;
                    height: 16px;
                    line-height: 16px;
                    text-align: center;
                    border-radius: 16px;
                    font-size: 9px;
                    font-weight: 700;
                    color: #fff;
                    background: rgb(240, 20, 20);
                    box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.4);
                }
            }

            .price {
                display: inline-block;
                vertical-align: top;
                margin-top: 12px;
                line-height: 24px;
                padding-right: 12px;
                box-sizing: border-box;
                border-right: 1px solid rgba(255, 255, 255, 0.1);
                font-size: 16px;
                font-weight: 700;

                &.highlight {
                    color: #999;
                }
            }
            .desc {
                display: inline-block;
                vertical-align: top;
                margin: 12px 0 0 12px;
                line-height: 24px;
                font-size: 10px;
            }
        }

        .content-right {
            flex: 0 0 105px;
            width: 140px;

            .pay {
                height: 48px;
                line-height: 48px;
                text-align: center;
                font-size: 15px;
                font-weight: bold
                width 140px

                &.not-enough {
                    background: #2b333b;
                }

                &.enough {
                    background: #92d4ef;
                    color: #fff;
                }
            }
        }
    }

    .ball-container {
        .ball {
            position: fixed;
            left: 32px;
            bottom: 22px;
            z-index: 200;
            transition: all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41);

            .inner {
                width: 16px;
                height: 16px;
                border-radius: 50%;
                background: rgb(0, 160, 220);
                transition: all 0.4s linear;
            }
        }
    }

    .shopcart-list {
        position: absolute;
        left: 0;
        top: 0;
        z-index: -1;
        width: 100%;
        transform: translate3d(0, -100%, 0);

        &.fold-enter-active, &.fold-leave-active {
            transition: all 0.5s;
        }

        &.fold-enter, &.fold-leave-active {
            transform: translate3d(0, 0, 0);
        }

        .list-header {
            height: 40px;
            line-height: 40px;
            padding: 0 18px;
            background: #f3f5f7;
            border-bottom: 1px solid rgba(7, 17, 27, 0.1);

            .title {
                float: left;
                font-size: 14px;
                color: rgb(7, 17, 27);
            }

            .empty {
                float: right;
                font-size: 12px;
                color: rgb(0, 160, 220);
            }
        }

        .list-content {
            padding: 0 18px;
            max-height: 217px;
            overflow: hidden;
            background: #fff;

            .food {
                position: relative;
                padding: 12px 0;
                box-sizing: border-box;
                border-1px(rgba(7, 17, 27, 0.1));

                .name {
                    line-height: 24px;
                    font-size: 14px;
                    color: rgb(7, 17, 27);
                }

                .price {
                    position: absolute;
                    right: 90px;
                    bottom: 12px;
                    line-height: 24px;
                    font-size: 14px;
                    font-weight: 700;
                    color: rgb(240, 20, 20);
                }

                .cartcontrol-wrapper {
                    position: absolute;
                    right: 0;
                    bottom: 6px;
                }
            }
        }
    }
}

.list-mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 40;
    backdrop-filter: blur(10px);
    opacity: 1;
    background: rgba(7, 17, 27, 0.6);

    &.fade-enter-active, &.fade-leave-active {
        transition: all 0.5s;
    }

    &.fade-enter, &.fade-leave-active {
        opacity: 0;
        background: rgba(7, 17, 27, 0);
    }
}
</style>
